The processing of uranium hexafluoride is considered in various publications, many of which deal with the production of oxides by high, temperature hydrolysis (pyrohydrolysis) [i4]. Apart from methods that provide a powder, it is also possible to produce a granulated oxide directly by pyrohydrolysis [4-8]. In that case, the essence of the granulation is that the uranium dioxide obtained by reaction of the hexafluoride with a steam-hydrogen mixture grows on nuclei consisting also of uranium dioxide, which constitute the material in a fluidized bed.